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MOUNTAINSIDE - NYC LLC
NPI 1427756469
Substance Abuse Rehabilitation Facility in New York, NY

Active since February 20, 2023CLIA 33D2286998 · Waiver
243 W 18TH ST, NEW YORK, NY 10011(860) 362-5232(877) 861-6507 Get Directions Write a Review

NPPES record last updated: February 20, 2023. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Mountainside - Nyc Llc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MOUNTAINSIDE - NYC LLC (NPI 1427756469) is a healthcare organization registered as a substance abuse rehabilitation facility in New York, New York and active in the NPI registry since February 2023. The organization holds a CLIA Waiver certificate valid through March 26, 2027 and lists Michelle Williamson, Vp, Revenue Cycle, as its authorized official.

NPPES Registry Identity

NPI1427756469
Entity TypeOrganization
Primary Taxonomy324500000X
Legal Business NameMOUNTAINSIDE - NYC LLC
Location Address243 W 18TH STNew York, NY 10011-4569
Mailing Address243 W 18th StNew York, NY 10011-4569 · (860) 362-5232 · Fax (877) 861-6507
Phone(860) 362-5232
Fax(877) 861-6507
Organization SubpartNo
Authorized OfficialMichelle WilliamsonVp, Revenue Cycle · (860) 362-5232
Enumeration DateFebruary 20, 2023
NPPES CertifiedFebruary 20, 2023
✔ NPI 1427756469 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySubstance Abuse Rehabilitation FacilityResidential Treatment Facilities
Taxonomy Code324500000X
Definition
A facility or distinct part of a facility that provides a 24 hr therapeutically planned living and rehabilitative intervention environment for the treatment of individuals with disorders in the abuse of drugs, alcohol, and other substances.
243 W 18TH ST, New York, NY 10011
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CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 33D2286998

Artemis Partners LLC Dba Mountainside Chelsea · New York, NY
Active · expires Mar 26, 2027
CLIA Number33D2286998
Laboratory TypeComp. Outpatient Rehab Facility
Certificate Effective DateAugust 8, 2023
Certificate Expiration DateMarch 26, 2027
Laboratory DirectorAlison B. Altschuller
Laboratory Phone(860) 824-1397
Laboratory LocationArtemis Partners LLC Dba Mountainside Chelsea243 W 18th St, New York, NY 10011
CLIA data matches this NPI record on: Address
This certificate is issued to a laboratory to perform only waived tests.

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

TESSA L CANDIOTTI
Social Worker (Clinical)
243 W 18TH ST
NEW YORK, NY 10011
New York County (646) 965-8080
NICOLE BARMAN
Counselor (Mental Health)
243 W 18TH ST
NEW YORK, NY 10011
New York County (813) 767-0500
MOUNTAINSIDE WESTCHESTER LLC
Community/Behavioral Health
243 W 18TH ST
NEW YORK, NY 10011
New York County (860) 362-5232
WYATT OFFIT
Social Worker
243 W 18TH ST
NEW YORK, NY 10011
New York County (212) 492-8088

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mountainside - Nyc LLC's NPI number?

The NPI number for Mountainside - Nyc LLC is 1427756469. It was assigned to this organization in the NPPES registry on February 20, 2023.

Where is Mountainside - Nyc LLC located?

Mountainside - Nyc LLC is located at 243 W 18th St, New York, NY 10011. The listed phone number is (860) 362-5232.

What is Mountainside - Nyc LLC's specialty?

The primary specialty registered for this NPI is Substance Abuse Rehabilitation Facility with taxonomy code 324500000X.

Does Mountainside - Nyc LLC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 33D2286998) is associated with this NPI, valid through March 26, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Mountainside - Nyc LLC was last updated on February 20, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.